Home / 13,446.80-20,122.20-8,518.80

Finding the Fourth Proportional to 13,446.80, 20,122.20 and 8,518.80

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Solution

The fourth proportional to 13,446.80, 20,122.20 and 8,518.80 is: 12,747.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,446.80 : 20,122.20 = 8,518.80 : x
  2. Step 2: Convert to fraction form
    13,446.80/20,122.20 = 8,518.80/x
  3. Step 3: Cross multiply
    13,446.80x = 20,122.20 × 8,518.80
  4. Step 4: Simplify right side
    13,446.80x = 171,416,997.36
  5. Step 5: Solve for x
    x = 171,416,997.36/13,446.80
  6. Step 6: Final answer
    x = 12,747.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.